Leno's motorcycle gleans $505,100 for Katrina victims

It looks like Jay Leno's celebrity-autographed motorcycle has raised nearly a half-million dollars for victims of Hurricane Katrina.

Bidding for the bike closed on the eBay auction Web site at 5 p.m. Thursday, and Leno announced during the taping of Thursday's "Tonight Show" that the winning bid was $505,100.

For the past four weeks, "Tonight Show" guests and surprise arrivals have been autographing the Harley-Davidson motorcycle. The final signers on Thursday were guests Matthew McConaughey and Angie Harmon and surprise walk-ons Jimmy Smits and Jennifer Love Hewitt.

Previous signers include Gov. Arnold Schwarzenegger, Billy Crystal, Reese Witherspoon, Adam Sandler, Jennifer Garner and Pamela Anderson.